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2 years ago

Simplify the expression: 2n + 10(9 + 4n)

Mathematics

2 answers:

babunello [35]2 years ago

8 0

Answer:

42n+90

Step-by-step explanation:

WITCHER [35]2 years ago

3 0

Answer: 42n+90
Explaination:

2
n
+
10
(
9
+
4
n
)
Distribute:
=
2
n
+
(
10
)
(
9
)
+
(
10
)
(
4
n
)
=
2
n
+
90
+
40
n
Combine Like Terms:
=
2
n
+
90
+
40
n
=
(
2
n
+
40
n
)
+
(
90
)
=
42
n
+
90

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Two angles are supplementary. One measures (3x) degrees and the other measures 51 degrees.

Fed [463]

Answer:

a. 3x +51=180

x=43

b. 3(43)+51 =180 51 degrees; 129 degrees

Step-by-step explanation:

3x +51 =180

3x=180-51

3x=129

x=43

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2 years ago

Three added to 4 times a number is equal to 5 less than 6 times the number.

GenaCL600 [577]

In numbers only:
4x + 3 = 6x - 5

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3 years ago

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inna [77]

$\huge{ \mathbf{ \underline{ Answer }\: \: ✓ }}$

The sand we need to fill the cylinders is equal to the total volume of the six cylindrical posts .

Given terms ( common for each cylinder ) :

height (h) = 4 ft
radius. (r) = 0.5 ft

$\large \boxed{ \mathrm{volume =\pi {r}^{2} h}}$

$3.14 \times \dfrac{1}{2} \times \dfrac{1}{2} \times 4$

$\mathrm{3.14 \: ft {}^{3} }$

Since volume of each cylinder is equal, so total volume of six cylindrical post :

$3.14 \times 6$

${ \mathrm{18.84 \: ft {}^{3} }}$

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3 years ago

Read 2 more answers

Explain how use mental math in 17+38

asambeis [7]

You would first look at the tens place numbers; 10 and 30. and add them together making 40. after that you'd take the ones places and add them together; 7 and 8. add those together and you'd get 15. to finish you just need to add the two numbers together 40 and 15.

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3 years ago

1. Identify the lateral area and surface area of a regular square pyramid with base edge length 5 in. and slant height 9 in.

zlopas [31]

1. C
L=1/2(Pxl)
L=1/2(20x9)
L=1/2(180)
L=90

SA=1/2(Pxl)+B
SA=90+5^2
SA=115

B, A, C, B.

6 0

3 years ago